GeoHot, the same person who created yiphone.org last week, has released a DFU tool for the iPhone. It uses an implementation of the same exploit that is present in PwnageTool 2.0, and allows you to do whatever you want at the iPhone’s DFU level. On his blog, he says:

“Also, heres why a certain person claimed the DFU was the key. You could, without any exploits, upload the 114 iBoot(even to the 3g), the 114 kernelcache(ok, this crashes on the 3g), and a hacked ramdisk. But the filesystems don’t mount. And even if they did, you’d need a way around sig checking.

Here is a little program(with source of course) to run whatever you want at the DFU level; an implementation of the dev pwnage 2.0 exploit. Pass it a binary file, it will start executing at the start of the file(no file formats to deal with). I’ll leave it to dev to explain the exploit used.”

You can read the full article here.Â

If you want to do some testing on your own, here’s the tool, but do so at your own risk, as I doubt that there is much support for this tool.